package thread;

import java.util.Scanner;

public class SleepDemo {
    public static void main(String[] args) {
        System.out.println("程序开始了.......");
        System.out.println("请输入一个数");
        Scanner scanner=new Scanner(System.in);
        for (int num=scanner.nextInt();num>0;--num) {
            System.out.println(num);
            try {
                Thread.sleep(1000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
        System.out.println("时间到!!");
    }
}
